Drosophila melanogaster
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA145717 | ENA |
REPOSITORIES: ENA
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Project description:<p>Viral studies of Drosophila melanogaster typically involve virus injection with a small needle, causing post-injury a wounding/wound healing response, in addition to the effects of viral infection. However, the metabolic response to the needle injury is understudied, and many viral investigations neglect potential effects of this response. Furthermore, the wMel strain of the endosymbiont bacterium Wolbachia pipientis provides anti-viral protection in Drosophila. Here we used NMR-based metabolomics to characterise the acute wounding response in Drosophila and the relationship between wound healing and the Wolbachia strain wMel. The most notable response to wounding was found on the initial day of injury and lessened with time in both uninfected and Wolbachia infected flies. Metabolic changes in injured flies revealed evidence of inflammation, Warburg-like metabolism and the melanisation immune response as a response to wounding. In addition, at five days post injury Wolbachia infected injured flies were metabolically more similar to the uninjured flies than uninfected injured flies were at the same time point, indicating a positive interaction between Wolbachia infection and wound healing. This study is the first metabolomic characterisation of the wound response in Drosophila and its findings are crucial to the metabolic interpretation of viral experiments in Drosophila in both past and future studies.</p>
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Project description:We recently reported that an orthologue of STING regulates infection by picorna-like viruses in drosophila. Here, we show that injection of flies with 2’3’-cGAMP can induce expression of dSTING-regulated genes. Analysis of the transcriptome of 2’3’-cGAMP injected flies reveals a complex pattern of response, with early and late induced genes. Our results reveal that dSTING regulates an NF-κB -dependent antiviral program, which predates the emergence of Interferon Regulatory Factors and interferons in vertebrates.
2020-05-31 | GSE140955 | GEO
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Project description:The innate immune response of insects relies on several humoral and cellular mechanisms that require the activation of circulating proteases in the hemolymph to be functional. Here, we analyzed the gelatinase and caseinase activities of Drosophila larval hemolymph under normal and pathogenic conditions (bacterial lipopolysaccharides or endoparasitoid Leptopilina boulardi) using in gel zymography. Gelatinase activity was more intense than caseinase activity and qualitative and quantitative variations were observed between D. melanogaster strains and Drosophila species. Mass spectrometry identified a large number of serine proteases in gel bands equivalent to the major gelatinase and caseinase bands and of these, the most abundant and redundant were Tequila and members of the Jonah and Trypsin protease families. However, hemolymph from Tequila null mutant larvae showed no obvious changes in zymographic bands. Nor did we observe any significant changes in hemolymph gelatinases activity 24 h after injection of bacterial lipopolysaccharides or after oviposition by endoparasitoid wasps. These data confirmed that many serine proteases are present in Drosophila larval hemolymph but those with gelatinase and caseinase activity may not change drastically during the immune response.
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